BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.bin / pascal / pxp / case.c

/*-
* Copyright (c) 1980 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)case.c      5.2 (Berkeley) 4/16/91";
#endif /* not lint */

/*
* pxp - Pascal execution profiler
*
* Bill Joy UCB
* Version 1.2 January 1979
*/

#include "0.h"
#include "tree.h"

/*
* Case statement
*      r       [0]     T_CASE
*              [1]     lineof "case"
*              [2]     expression
*              [3]     list of cased statements:
*                      cstat   [0]     T_CSTAT
*                              [1]     lineof ":"
*                              [2]     list of constant labels
*                              [3]     statement
*/
caseop(r)
       int *r;
{
       register *cl, *cs, i;
       struct pxcnt scnt;
#       ifdef RMOTHERS
           int *othersp;               /* tree where others is, or NIL */
           int hasothers;              /* 1 if others found, else 0 */
#       endif RMOTHERS

#       ifdef RMOTHERS
           if (rmothers) {
               hasothers = needscaseguard(r,&othersp);
               if (hasothers) {
                   precaseguard(r);
               }
           }
#       endif RMOTHERS
       savecnt(&scnt);
       ppkw("case");
       ppspac();
       rvalue(r[2], NIL);
       ppspac();
       ppkw("of");
       for (cl = r[3]; cl != NIL;) {
               cs = cl[1];
               if (cs == NIL)
                       continue;
               baroff();
               ppgoin(DECL);
               setline(cs[1]);
               ppnl();
               indent();
               ppbra(NIL);
               cs = cs[2];
               if (cs != NIL) {
                       i = 0;
                       for (;;) {
                               gconst(cs[1]);
                               cs = cs[2];
                               if (cs == NIL)
                                       break;
                               i++;
                               if (i == 7) {
                                       ppsep(",");
                                       ppitem();
                                       i = 0;
                               } else
                                       ppsep(", ");
                       }
               } else
                       ppid("{case label list}");
               ppket(":");
               cs = cl[1];
               cs = cs[3];
               getcnt();
               ppgoin(STAT);
               if (cs != NIL && cs[0] == T_BLOCK) {
                       ppnl();
                       indent();
                       baron();
                       ppstbl1(cs, STAT);
                       baroff();
                       ppstbl2();
                       baron();
               } else {
                       baron();
                       statement(cs);
               }
               ppgoout(STAT);
               ppgoout(DECL);
               cl = cl[2];
               if (cl == NIL)
                       break;
               ppsep(";");
       }
       if (rescnt(&scnt))
               getcnt();
       ppnl();
       indent();
       ppkw("end");
#       ifdef RMOTHERS
           if (rmothers) {
               if (hasothers) {
                   postcaseguard(othersp);
               }
           }
#       endif RMOTHERS
}